[gtk+] Update GdkOSXVersion enum with the last 4 MacOS releases.

[John Ralls <jralls src gnome org>]

commit a45f96e9cb8551f724c202666057e81189588aee
Author: John Ralls <jralls ceridwen us>
Date:   Sat Nov 5 14:59:56 2016 -0700

    Update GdkOSXVersion enum with the last 4 MacOS releases.

 gdk/quartz/gdkquartz.h |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/gdk/quartz/gdkquartz.h b/gdk/quartz/gdkquartz.h
index 6b7b434..4ef3bd7 100644
--- a/gdk/quartz/gdkquartz.h
+++ b/gdk/quartz/gdkquartz.h
@@ -49,7 +49,11 @@ typedef enum
   GDK_OSX_SNOW_LEOPARD = 6,
   GDK_OSX_LION = 7,
   GDK_OSX_MOUNTAIN_LION = 8,
-  GDK_OSX_CURRENT = 8,
+  GDK_OSX_MAVERICKS = 9,
+  GDK_OSX_YOSEMITE = 10,
+  GDK_OSX_EL_CAPITAN = 11,
+  GDK_OSX_SIERRA = 12,
+  GDK_OSX_CURRENT = 12,
   GDK_OSX_NEW = 99
 } GdkOSXVersion;